Best available corn



uw )Mw/ P. A. RICCIO.

APPLICATION HLED APR. 2. 1919.

Patented Oct. 12, 1920.

IN VEN TUR @4f/ccm UNITED `S'IA'LES liSATENT OFFICE.

Speciication of Letters Patient.

Patented Oct. 12. '1920.

Application mea ,April 2, 1919. seriaino. 286,967.

fo 'ad w/'lmnit may cof/wem: f j, ig

Be it known that l, AsQUALnA. gemelo, a citizen of the United States, and a resident of the cit of New York,-bo1ough ofI Brook- 1 n, in t e county of Kings and Stateot lNeW York, have rinvented aj' new.,and1m proved Fuse, .ofwhich the ,following is a full, clear, and enact` description... j

This invention relates'to fuses, and aims to provide a device -o ythis inaturewhich may primarily be handled bylabsolutelyfin.- experienced operators withoutany danger of the .fingers being burnednipon the insertion of such fuse into the conventional clips. A further object of the invention iste provide afusewhich incorporates iconstruction eliminating the t necessity .or ,fuse switches, in,that the vfuse itselfinoorpoates a switch feed. l 1;

Another object of the-invention, is Kthe provision of a fuse whichgwill ,permit of the renewal of the fusible ,material aty Liar less cost than for the fuses of the renewal type now upon the market. j n.

A nal object is the provision ofjajuse in which the most inexperienced operator .can immediately find. out .asto whether the same has been blownl or not., 1

Reference is had'to, the aceornpz-inying drawings which illustrate one ,practical embodiment of my invention, and in which#- Figure l is anelevationalyiew o-'Iny improved form of fuse; t 5..,

Fig. 2 is an end ,view ofthe fuseas illustrated in Fig. l showing the same embraced by conventional,fuse'clipsg j" f Fig. 3 is a side elevation, partly insection, of a fuse havin the same ,general characteristics of the evice illustrated in Figs. l and 2 but being slightly modified so as to be more particularly adapted `fo`r use in connection with high amperage circuits; and v- -Fi 4 is a section taken `along the lines A- ofFi.2.

In these rawings the reference numeral 1 designates the outer body or casing of fiber, rubber, or any other suitable insulating material, which body is provided with two notchesat each of its upper and lower ends2 which notches are preferably located at diametrically-opposite points in the circumference of the casing. Mounted in the ends of the casing 1 are caps 3 of metal provided with integral lugs 4, whlch lugs are are adapted to project through the notches 2 and to bebent downwardly at right angles so as to lie againstI the side Walls of the casing l. The-ends of such lugsd are preferably prong shape as shown at, such .rongs tbeing projected inwardly into` the ment of, the caps 31 is ,efer'ztua'lly,preyented Considering now the derice'illustrated in l `ig.:4, it wil he seen thatthe cap 3'is provided. with a screw-threadedppening in which is mounted a screw`5,f` Affurther opening 6 extends throughr the cap `3 -and pro'ectmg. throughgsuch'openin an eX- ten ing, between vthe ,upperjjand; oyve'lr caps 3 is a fusible wire? lwhose ends, asafore- ,ody ofthe casing'l, so thatanydisplace.-

said, project throughtheyopei1fingl6, subse n device illustrated` in Figgjrmight operate wellenough on a low amperage ircuit, upon the wire 7 fusing Aa terrificheatwould be set up infthe Casin V1, which'lieatrgmight result in' the mutilatl'ngol thejthreads 4of the ,screw 5, which would -renderlitex4 tremely diilicult to rotatesuch screw so that replacement lof the'wire 7 might be ef fected. Tov overcome' this, I'have slirrhtly modified thecap 3, as illustratedin 3,

by securing, in any suitable, manner, a4 lug 9 of any material to the underside ofthe cap 3; and I have extended the screwthreaded opening in which the screw 5' seats into such plugr 9 in the form of a socket, so that the,v screw threads upon the plug 5 will not be exposed to any llame upon the wire 7 fusing, and, consequently, it will be impossible for injury to result to the screw threads upon the screw 5.

In operation it will now be seen `that the fuse'is inserted 'intoVr the'clips ofV a conventional fuse blockas has'been illustrated in Fig. 2, with the 1u s 4 in contact with the spring clips. To etermine as to Whether the fuse is still in good condition, all that it is necessary to do is for the operator to turn one of the fuses so that the lugs #t almost contact with the spring clips of the fuse block. Assuming now that the feeder fuse has not been blown and that there is by the spring clips.

a load upon the circuit, if a sparking does not result the fuse is dead, orl else the line in which the same is i'nte'rpbsed is grounded.

It will be appreciated that by this method of insertion, all danger of sparking, such as occurs in the usual fuse upon its inscrtion into th'e clips of a block, is eliminated by virtue of the fact that no circuit is es tablished through the fuse, even although the same may be seated in the clips, until the body and, consequently, the lugs 4, have been rotated so that such lugs are engaged It will furtherr be appreciated that by this rotational movement,I thefuse may be usedas a switch, as the circuit vvillbe` entirely lbroken every timethe fuse is rotated.

It will be understood that by the arrango ment `of the fusiblewire, such" wire may readily be "renewed, should ihe's'ame become burned out, and it Wi'll alsoi=be understod that the cost of such renewal Willr'un 'fii'r less ,than the cost of renewals in friise's'Z noni 'lonthe market. v v"'Hiwiug tlius described niy invention, I as neiv and' desire to' seciire by Let terslfratenth; f

.,1- A fuse iimzludliilsy a. bQdy vertice, e fusible eleljienltwithn suoli' body' portion", contact surfaces attached to the ends of Vsaid fusible element, said body portion".be` ing adapted .to be a'pplied'to nndretuin'ed by conventional fuse clips, the Contact sun 'feces threpifybearn against sind chris, $11011 bodybeingiiadapte y to be ino'vedV whereby tot' disengage the clips `end contact surfaces f `Without removal of,V such fuse from said dips 4Wh lreby said fuse is adapted to serve as aswibih 42.` A` fuse including a body portion, a fusible elerlnent Within said'body portion, Contact surfaces arranged upon the o'uter face f, adjacent the ends of seid boda' portion, .and being flinbsled .at points. diametri cally opposite'fto oneanother, 'said' Contact (surfaces, being secured to thle ends of said fusible element` and bearing against con ventional fuse Aclips Yvvliich serve to, retain said Vf usefin applied position, said fuse serving-asa ,switch upon the rotation of said bdy Portion, which @euses ii disengagement -Qftlg1-e0ntts'ur-faqs andfclir- 3. ,A fuse, including e cylindrical body of insulating materiale notches" formed' in theuppe and lower gesi simil bdy, taps inherited, in the uriner, and lower ends 0f the body and havin certain of their portions projecting t rough such notches whereby to provide contact points, and cur- ,lentconducting means extending between such caps.

A fuse, including a cylindrical body of insulating material having notches formed at diametricallybpposite points in its upper and lower edges, caps mounted within its 'upper and lower ends, certain ortions of such caps extendingthrough the notchesl whlereby to provide Contact points, and current-conducting means extending betvveen'such caps; ""1" "l "5. A fuse, including a cylindrical body of insulating material provided with notches in its uppeaid' lower 4"edges, caps'mounted in ts upper and lower ends, such caps being' formed )with lugs adapted to extend outivardlywthrough the notches and 'downwardly alongthe-sidesof the fuse, Where to provide Contact points, and current conductinglneans egtenrdng between such caps.

61A fuse, including a, cylindrical body 'of insulating material provided withnctches A.vilfardly alon sidesofthe fuseand having4 their en s prong shaped and ezitending into the outer fc''of the body, and 'current-conducting means extending tbetween such caps.`

7. A. Vfuse, including a body of insulating historial, caps 'mounted in the upper' and lower ends of suchf body, fusible'wire eX- t'ending between suchfca s, screws projectifng ,throuoil'i ,siich'caps' aldfbeing adapted to retain in applied positionftheends of the wire, and-means c'bnnected with such caps forprotectin 'tliebase ofjthe screws.

s. -A fuse; incur Kirrgja body f nieguen material, caps v`Inounted Ain the upper. an im@ eri-ds of -sich belly, fusible wire extending itwn Sihf Caps, Sehens rreieting through subh caps en'd being adated to. retain in applied position the ends o' the www ,fi-r,.effin- 

